Comparative study of carbonic anhydrase activity in waters among different geological eco-environments of Yangtze River basin and its ecological significance

作     者：Sila Onesmus Nzung'a Weizhi Pan Taiming Shen Wei Li Xiaoqun Qin Chenwei Wang Liankai Zhang Longjiang Yu 

作者机构：Institute of Resource Biology and Biotechnology Department of Biotechnology College of Life Science & Technology Huazhong Universityof Science & Technology Wuhan 430074 China Institute of Karst Geology Chinese Academy of Geological Sciences Guilin 541004 China Key Laboratory of Karst Dynamics Ministry of Land and Resources/Guangxi Zhuang Autonomous Region Guilin 541004 China Teachers Searvice Commission-Kenya P.O. Box Private Bag 00100 Nairobi Kenya 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2018年第30卷第4期

页      面：173-181页

核心收录：

学科分类：08[工学] 0815[工学-水利工程] 

基　　金：supported by the Sub-project of Geological Survey Work Item of China Geological Survey Bureau (No. 12120113005200) the Fundamental Research Funds for the Central Universities (No. 2015QN102) 

主　　题：Yangtze River basin Carbon sink Eco environments Water body Carbonic anhydrase(CA) 

摘      要：This study provides the presence of carbonic anhydrase（CA） activity in waters of the Yangtze River basin, China, as well as the correlation of CA activity with HCO-3 concentration and CO2 sink flux. Different degrees of CA activity could be detected in almost all of the water samples from different geological eco-environments in all four seasons. The CA activity of water samples from karst areas was significantly higher than from non-karst areas（PP3-concentration（r = 0.672, P2 sink flux（r = 0.602, P = 0.076） in karst areas. This suggests that CA in waters might have a promoting effect on carbon sinks for atmospheric CO2 in karst river basins. In conditions of similar geological type, higher CA activity was generally detected in water samples taken from areas that exhibited better eco-environments, implying that the CA activity index of waters could be used as an indicator for monitoring ecological environments and protection of river basins. These findings suggest that the role of CA in waters in the karst carbon sink potential of river basins is worthy of further in-depth studies.